To use 2 switches to control the same fixture, you will need to use two 3-way switches.
Run 2-wire cable from the fixture to the first switch. Between the switches you will need to run 3-wire (with ground) cable. (The white and red wires will be the switched wires.) ......

A: Start by checking all the GFI outlets in the house. Press "Trip" and "Reset" on each one. Outlets requiring GFI protection are often wired through a GFI outlet in another part of the house, so check them all. You can find them in the: